Sash-holder



(Nd Model.)

G. W. LEWIN.

SAS'H HOLDER.

Patented Jan. 9,1883.

INVENTUPQ WITN ESEEEI UNITED STATES PATENT Farce.

GEORGE W. LEWIN, OF FALL RIVER, MASSACHUSETTS.

SASH-HOLDER.

SPECIFICATION forming part of Letters Patent No. 270,229, dated January 9, 1883.

Application filed May 1,1882. (No model.)

To all whom it may concern Be it known that'I, GEORGE W. LawiN, of the city of Fall River and county of Bristol, in the State of Massachusetts, have invented a new and useful Improvement in Window- Springs; and I declare the following to be a specification thereof, reference being bad to the accompanying drawings.

Like letters indicate like parts.

Figure 1 shows the application of my improved window-spriug to a sash. Figs. 2 and 3 are vertical side plans of my. invention, showing the spring in position at its leastand greatest pressure, respectively. Fig. 4 is a vertical front plan, showing the form and location of the spring, with the pressure'bar removed in part to allow a more distinct view. Fig. 5 is a transverse horizontal section on line at m of Fig. 1.

My invention relates to that class of window-springs in which the sash is sustained in position by lateral pressure of a spring made adjustable,by a screw and nut and'exerting its pressure at both its free ends by means of oscillating links upon a pressure-bar, which is forced automatically into contact with the window-frame by the movement of said links.

In the drawings, A represents a plate of metal or other suitable material, which lies flush with the inner surface of the sash, as shown in Fig. l, and is attached to the side of the sash, as shown in Figs. 2, 3, and 4, by screws passing through ear-pieces a a. plate A is thickened at its center, as shown in Figs. 2 and 3, at which point it is perforated to receive the adjustingscrew B. The screw B passes through the spring G into and through the nut D. The spring 0 is flat and prefer ably made of a bow-shape, and is furnished with slight projections b b, and lies between posts 0 c c c. The nut D is square, and has The l by an interior ridge, of which the posts 0 c and c c are the projecting ends. By means of the screw B and non-rotating nut D the from the inner surface of the plate A, and thus varies to any desired degree the pressure each end of the spring 0 is a link, E, shown in Figs. 2 and 3, and pivoted or hinged to. the ends ot't'ne spring 0, and also to the ends, respectively, ot' the pressure-bar F. The bar F is made of any suitable material; but I prefer to make it of steel, with an external layer of lead, the latter to come in contact with the window-frame, as I consider lead to be a bet ter wearing or friction surface for the purpose.

The operation of my improved wind0wspring is as follows: In raising the sash the parts are in the position shown in Fig. 2. While the sash is being lifted the pressure-bar F falls to its lowest position, relieving the strain upon the spring 0, and consequently diminishing it own friction on the window-frame. As soon as the window has been liftedthe desired height and is left unsupported by the hand it falls for a short distance by its own weight, which causes the pressure-bar F to rise, by means of the link movement, to the position shown in Fig. 3, thus causing the spring 0 to be bent, thereby sutficiently increasing the friction to prevent the further descent of the sash.

The reason of makingthe spring 0 in a bowshape is to bring the adjusting-screw B into a position to be easily accessible without removing the head (1. as will be apparent by inspecting Figs. 1 and 5. t

1 claim as a novel and useful invention and desire to secure by Letters Patent scribed, consisting of the plate A, screw B, spring (J, nut D, links E E, and pressure-bar F, combined and operating substantially as and for the purpose specified.

GEORGE LE WIN.

Witnesses:

JAMES M. MoaToN,

ANDREW J. JENNINGS.

of the spring 0 when bent upon its fulcra. At

The improved window-spring herein despring 0 may be brought nearer to or farther' I 

